Drill-assembling unit



May 31,1927. 1,630,825

1 J. BOWMAN ET AL DRILL ASSEMBLING UNIT Filed March 9. 1926 Patented a 31, 1927.

This invention "relateslto improvements in i f f, ST

E WARDYJQQQWM N ANACON'IDA, AND JOHN s, MYHBET'OFBUTTE; MQNTYAfiAQASpp-TY a I Le eRE-i" anvils for assembling detachable drill, heads upon; theirshanks, and more particularlyto an integral knock-pit and knock-on block for such; purpose. I

One of the objects of thefpresent inven tion ,is a; simply ,Inannfactured; block which serves as ananvil during the placing'andremovingof detachabledrill heads and shanks."

Asfnrther ob] eet is to provide such a structurein which thedrill head'is preyented from flyingafter it has been separated from 7 its fshank, and: thus becoming lost'among llocalrubbish.

tureof a compactiandintegral form, and

' which maybe employed ihmine or other i the block, with drill heads and shanks rep-" resented thereon in the respective positions til) localities where drilling, is required, and which maybe transported and fixedf'without especial difliculty. v i v on the accompanying;drawing;

Figure 1 represents a perspective View of for assembling andydisniounting. v

Fig.2 is a section on lme 2-2 ofFig. 3. Fig. 8 vis a' front elevation. 1

According to this nvention, a unitary block of cast iron, steel or other suitable metal, is prepared in a peculiar formfor cooperation with a detachable drillhead and its shank.

As described in Patent Nos 1,511,201 and 1,511,466, drill shanks may have separable drillheads fastened thereto by a Wedging-e connection whereby the head and drill are locked during the operation of the drill web in a mining machine. 7 It is, however, necessary that the drill head and the drill shank be separated from each other from time to time in order that the drillhead' may be sharpened, for eX- ample, on thema'chine represented in the copending application of Joseph F.'Maicke1,

filedJan. 14:, 1926, Serial No. 81,221. For

,Anotlierob ect s top'royide such a struc-' V DBILLJASSEM'BLING trivia.

piin ease as warm am the-drill; head; lnii'epla'cing the idrill; head. Pres r esh nis s suanysipp d y n; placeby ihand, and} then a blow-is given 7 alocked relative position,

upon it'laterally to; drive'tliefinembers into p I!" 1,7 The block employed'forthese purposesjacj I cording to the present invention comprises f a substantially fiat 1 base lO having 'a ,cut-out portion ll atthegfron fiend, and the holes 12 whereby theQdeVicef. may be spiked to; a

device in its, form is readily adapted to ga, I

firm support.

knock on {block 13 whichlpres'ents a frust,o

Upstanding: baseconicalecjavity l. This block 13 is forined integrally with? the -.base .j

' ,Li w s t r .ant graily withtil 3 s -the upwardly extending web wall' l5 ,;of th 1 C f if".- .0 ahav nlg. a .f vlp ie' 175, flange 16 -th'ereon to clelimit a cavityjl 'fl Thg bottom wall of the cavity l'fZ is formedj by the inclined surfaces 1S; and :the mmw ho temzsurf ce11 -5 :T 1 tu n ,l extendswlththe vertical stepped walls 20 intorelation with the inclined surfaces 18 so that the -narrow bottom surfacel9 is presented merely for the forwardparts of Cutting" edg s f the drill head, and

the shank'is entirely free therefrom.-

v The drill 1 l H and the drill shank S" when in assembledpos'ition are placed with two of the four cutting edges resting firmly l on the surface 19 and against the inclined I surfaces 18, withqthe, connectin'gtongue and.

socket'of the'he'ad and shank'respectively in' a vertical plane (dot-and-dash lines in F 1). 'A blow'ot hammer upon the shank i will force it-downwardly'and "the head H will be stripped off and remainheldwithin the walls'loand 16 Vofthe cup cavity "17.-

It is pointed out specifically that theimpaCt- 2 i i flgtoolsuch asa hammer iS Prevented froni' striking upon the cutting edges of the drill-If .head I-lduring incautious' blows eitherby accidentor by reason ofdarkness at the'point of work.-

A new sharp, drill hea d H may then bei' placed upon'the shank'Sby "slippingit' loosely into position with the :fingers,a d the shank presented in *the'cavity 14 (da 11 lines in 1) A slightblow with'a ham-.5 mer upon. therearportion ofthe drill head l will Cave it down may ,apbsitien in which it is held firmlv in place in the "shank S. I 7

h It isehvims that the i'hviitidrz is limited iii essence to the partieiilar illiistra tion shown, but that it may be' modified ithin the scope of the appended claimsg I Weelaim': i

' 1; A'bleck for asseh'iblihfgl*and dismofinti'ng separable drills comprising ametalbase plate; an Integral i'het'al'" a r'c'h' formed with said plate, and rejecting therefrom; a 'clbsing wan-atone en'df'Qf' said-iarhfintegral with said plate; jSaid' 'a'late being cut away v :at the opposite end jo t aid arch, and" a pro' 'jection. 011 said late. formin in" o'njurictio'hwith one Wall; of 'said; archlah offenended groove, so ftha't the head (if asepa rabl'e drill" may be laid t pelis'ai d ba'seyvit'h in said arch aiidfthe" shank after detach-y ment by a blovv ma move freely-downward in said cut away portio n and so th'ata Shank may beilaiid in said groove" hile a drill head is being driven .thei e0ht0';

comprisi 'ng a base-plate with aWpOrtiO h of its upper surface formed tosiipp rt' the,

V drill head free of thedrill'shank, al'id'a retaiiiing h'ood formed integrally with said plate and arching above the said surface," said, flange serving t6 prevent'flying ofthe drill head when theshank isdetached" therefrom by a hammer blow l 3.- A knock-Ofi block for separablejdrills comprising a metal plate with a" portion of "QJA knock-off block for separable drills its ifpfoerv surface fermeid to s llplholfi] the 'drill head free of the drill shank, and a a i ei an e f med in e ra y hsa plate and araida oveisaid urface; meaas f a 011 said platetbali esa idseparable llso that its head is" heii'athsaid'flafigqfsaid flange donning a guard to prevent the 'im pacting tool from striking the ,cutting i edges: of. the drill, head during hammering upon the drill Fshank to separate the same) from the; dri11 -head-.- I r 4;; Afblock for assembling andidinimint l the r pper-surface of said baseiipla'te having afcoinmonprojection: 011 said ba se to fqrm I the se arating 'vv'all tlierehetv'veen said, pr I 1]"(3'Cl3l0ll hem gfcorltinuedf arcuately and ne yq 1 mg into .the other wallz. rbf onefi-of' said for separatingthe head" aiid shank-"and t6 I ting separable {drills ,eo prisinga 1- metal f3} :T

'b'ase plate jtwo parallel grooves formed 11 f and whereby said other groove is adapted to-siippo rtithe shank free' of the drill head 7 to-"facilitate assembling; of said shank and 7 head.

In testimony whereof, We affix ourisigna 'tures! 

